突起・凸起|とっきtokki[0]heiban (flat)
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- noun, suru verb, intransitive verbprotuberance; projection; prominence; protrusion; bump; boss; process; apophysis
Conjugation
| Dictionary form | 突起する（とっきする） |
|---|---|
| Polite (masu) | 突起します（とっきします） |
| Negative (nai) | 突起しない（とっきしない） |
| polite (masen) | 突起しません（とっきしません） |
| classical zu / nu | 突起せず・突起せぬ（とっきせず・とっきせぬ） |
| Past (ta) | 突起した（とっきした） |
| polite (mashita) | 突起しました（とっきしました） |
| Past negative (nakatta) | 突起しなかった（とっきしなかった） |
| polite (masen deshita) | 突起しませんでした（とっきしませんでした） |
| Te form | 突起して（とっきして） |
| Potential | 突起できる（とっきできる） |
| Passive | 突起される（とっきされる） |
| Causative | 突起させる（とっきさせる） |
| Causative passive | 突起させられる（とっきさせられる） |
| Conditional (ba) | 突起すれば（とっきすれば） |
| tara | 突起したら（とっきしたら） |
| Volitional | 突起しよう（とっきしよう） |
| polite (mashou) | 突起しましょう（とっきしましょう） |
| Imperative | 突起しろ（とっきしろ） |
Common forms generated by rule; see the senses for honorific or irregular usage.
- SynonymこぶNeutralA lump or swelling, also a hump; used for growths on the body or a tree, while 「突起」 is for a part sticking out from a surface.
- Synonym膨らみふくらみNeutralA rounded bulge or swelling, as in 「胸の膨らみ」; suggests something puffing out rather than a part projecting from a surface.
- Synonym隆起りゅうきNeutralUplift of the ground by crustal movement, or a local rise in the skin; 「突起」 is for a part projecting from a surface.
- Synonym突出とっしゅつNeutralProtrusion of a part, but also figuratively standing out, as in 「突出した才能」; 「突起」 never means prominence.
- Synonym突き出しつきだしNeutralA protruding part, but also a snack served with drinks or a sumo pushing technique; highly polysemous.
- Synonym出っ張りでっぱりCasualColloquial word for something sticking out, as in 「壁の出っ張り」; 「突起」 is the more written, technical term.
- Synonym出張りでばりNeutralA part of a building or the terrain that juts forward, such as an eave or a cape.
- Related突き出るつきでるNeutralVerb meaning to protrude or push through and out; describes the action, where 「突起」 names the part.
- Related飛び出すとびだすNeutralColloquial verb: to jump or rush out, and also to protrude; focuses on the action.
- Related張り出すはりだすNeutralVerb for jutting or overhanging outward; also used for putting up a notice; stresses stretching outward.
- Related飛び出るとびでるNeutralColloquial verb for bulging or protruding, as in 「目が飛び出る」.
- Relatedはみ出すはみだすNeutralVerb for spilling or being squeezed out, or exceeding a limit such as a budget; stresses overflowing.
- Relatedはみ出るはみでるNeutralColloquial verb with the same sense as 「はみ出す」: to spill out or stick out past an edge.
- Related出っ張るでっぱるCasualColloquial verb for sticking out, as in 「お腹が出っ張る」.
- Related出張るでばるNeutralVerb for projecting forward, but more often used to mean going somewhere on business.
- Related突出物とっしゅつぶつNeutralA protruding object; a descriptive, technical term for the thing itself.
- Antonym凹みへこみNeutralAntonym: a hollow or dent, the opposite of a protruding 「突起」.
「突起」 is a written, technical word for a part sticking out from a surface (「小さな突起」「虫垂突起」). In speech say 「出っ張り」; a lump on the body or a tree is 「瘤」, ground uplift is 「隆起」. For the action, use verbs: 「突き出る」, colloquial 「出っ張る」, 「飛び出す」, 「飛び出る」, 「張り出す」, or 「はみ出す」/「はみ出る」 for spilling past an edge; 「出張る」 usually means going on a business trip. 「出張り」 names a jutting part of a building or terrain, 「突出物」 the object itself, and 「突出」 can also mean standing out, unlike 「突起」. 「突き出し」 is polysemous; 「凹み」 is the antonym.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only
